First ever grow help welcomed

feeding well all taking around 2.5 litres each day to get 20% run off. ec in run off is back to normal sitting around 1.6. using 15ml each of a&b and 10 ml of bloombastic per 10 litres of water ph at 6. the blue cheese is fattening up nicely the cheese not as much and the slower cheese is starting to stack and fill in gaps. the slower cheese is nearly twice the height of the other 2 and has stretched to the light at its highest position. some light leaf curling from being so close but doesn't seem to have burnt it so just leaving now. will do a heavy defoliation next week as will be getting close to flush and be ready for the buds to swell. Edit day 66 my microscopic camera arrived so done my best at getting some pics of the trichomes. any advice on when to start flushing for 2 weeks. 2 pictures of each plant in question added